EDIT: please don't use the "pagination" CSS rule above. It will NOT remove the Actions! menu button. It WILL remove every paging block on your forum, and you will no longer be able to access individual pages of multi-page lists of topics/posts!

You must have your system CSS turned off. forumotion "updated" (in quotes because what they did made no sense!) the spoiler, and it now requires CSS to work. Add the following three rules to your CSS, and spoilers will work again.